Fiber-laying roll



'Y sgpn 21 r1926.

- 1,600,529 C. BARLOWv ET AL FIBER LAYING lROLL Filed April 28. 1925 2Sheets-Sheet 1 A 1 2 I i i r *.v .Hm/H517. E. HWP.

Sept. 21 1926. A 1,600,529

K C. BARLOW ET AL FIBER LAYING ROLL Filed April 28. 1925 2 SheebS-Sheet2 Z'N s. 'a/ysggafau. .Eu/151.1. E. .nPP.

Patented Sept. 2l, 1926.

UNITED STATES PATENT oFiicE.`A

GONE BARLOW AND EDWARD RICHARD CLAPP, OF DONNAC-ONA7 QUEBEC, CANADA.

IE'IBER-LAYING ROLL.

Application ledrApril 28, 1925. Serial No. 26,539.

This invention relates to improvements in fiber laying rolls for papermaking machines and the ,objects of the invention are to providelpositiv-e counterbalancing mechanism .for relieving any required' amountof the total weight of the fiber laying roll from the paper web as itpasses between such roll and the suction couch roll whereby thedeflection i l v of the fiber laying roll, without regard for vuniformfinish on both sides of the finished sheet of paper under all conditionsand to yrelieve the wear and tear on the Fourdrinier wire caused by thetoo excessive weight of the fiber laying roll running thereon. i

A still further object is to provide counterbalancing mechanism forrapidly andeffectively varying. the setting of the fiber laying rollwithin a veryv short range over the limitsof the suction couch roll,thereby lending flexibility to the installation to meet varyingconditions of stock on the wire and thus provide greater efficiency inthe running of a paper making machine.

It has been found that in paper making ,machines of approximately twentyfeet, a

liber making roll, in order to be .strong enough, becomesso heavy as tocrush the lourdrinier wire into the perforations of the couch roll andthereby cause rapid deterioration 'and wearing out of the wire. f

It has also been found that, under certain conditions, the` increasedweight of the fiber laying roll has an injurious effect on the qualityof the paper web tending to create a greater amount vof surface finishon one side of theisheet than on the other. l To' 'overcome this it wasnecessary that the roll be constructed strong and heavy enough towithstand deflection and at the Sametime be-su'pported in such a waythat partvof its weight might bey counter-balanced and the resultingpressure of the fiber laying roll on 'the paper regulated to whatevereX- tent necessary. Y

According to the present invention, therefore, the essential featurescomprise counterbalancing mechanism for regulating the pressure of thefiber laying roll on the paper web as described in thepresent/specification and illustrated in the accompanying drawingsforming part of the same.

eferring now to the drawings in which"` like characters of referenceindicate cor` responding parts in each figure, Figure ,1 is an endelevation'showing'the ends of the fiber laying couch roll, Y

vFigure 2 is a front elevation of the fiber laying roll and the suctioncouch roll,

Figure 3 is a plan of the fiber laying roll roll and the .suction andthe supporting end ball bearings, partly in section, f ,v

' Referring more particularly to the drawi- Aings, 10 designates thesuction couch roll shell held in' housings 11 at each end, while 12 isthe fiber laying roll riding on top vofv the suction couch roll.

As illustrated inFigure r1,`the dotted lines showthe different'positions of the fiber lay` ing roll, with yreference to the couchroll, that canl be obtained with applicants con:

struction'. Referring now more particularly to this, the fiber layingroll 12 rotates in ball bearings 13 at each end, which in turn yaresupported in levers 14 vto each of which is lattached 'a weighted leverarm 15 adapted to carry weights 16. The levers 14 are'loosely connectedthrough pins 17 to levers 18 in turn keyed by means of set screws 19 onthe horizontal shaft 20 running parallel to and above the fiber layingroll' 12. This shaft` is supported at eaclikend in bearings 21 at-ltached to the couch'roll housings 11. On oneend of the shaft 2O is keyeda lever 22 by means of a set screw 23. This lever carries on top aswivel screwed block or nut 24 through which passes a screw 25 providedv`with an operating hand wheel 26 on one end and adapted at the otheren-dto extend into a swiv-el bearing block 27 supported in the bearingbracket 27a.4 The screw 25y is held in the swivel bearing block 27 'bymeans of collars 28, while 29 Vand 80 are locknuts for the screw 25adapted to lock it at any desired point of its travel when operated' bythe hand Wheel 26 through lthe swivel screwed block or nut 24. v r

Set in theV lever 18 is va screw 31 adapted to engage with the lever 14as the hand wheel 26, operating the'screw 25, is rotated to lift `thefiber laying roll `clear from thle surface of the suction couch roll atany desired point within the range already referred to.

It will also be noted that the arms 15 are formed with spaced slots 15aM'and that the weights 16 are provided with pins 15b adapted todetachably engage with said slots whereby the weights are movablymounted on the arms. 32 is a cot-ter pin thro-ugh the end of the arms 15to prevent the. weights from slipping off.

From .the -foregoing it will be seen that with the lever 22 locked bythe nuts 29 and 30 on the screw 25 as illustrated in Figure al, and thelevers 22 and 1.8 keyed on the shaft 20, the liber layingroll 12 ispractically suspended from said shaft by means of the .swinging pin'connection 17 between the levers 1.8 and 14. This pin 17 then becomes afulcrum for the lever 14 with the ber roll 12 on one end and the weights16 o-n the other end, thereby providing positive counter-balancingmechanism for regulating the pressure by a manipulation of the 'weights16, on 15 of the liber laying roll on the paper web, .as may .berequired, thus 4assuring a .correct and uniform finish von both sides of.the sheet ofpaper under all conditions. The :manipulation of lock nuts29 permit locking or setting the position ofthe fiber laying roll at anypoint within a three inch range overV Vthe limits of the suction chamberof the suction couch. 4

Furthermore it will be seen that in order .to regulate the pressure.exerted .by the weight Vof .the liber laying roll 12 on the paper web,'between it and the couch roll V10, it lis only necessary to `adjust theweights 16 carri-ed .by the arm 15 to raise or lower the lroll 12.

As many changes could be made in the 'above construction and manyapparently Vwidely dilferent Aembodiments .of our invention within thescope .of .the claims, construct` ed without Vdeparting from the .spiritor scope thereof, it is intended that all matter contained in theaccompanying specification and drawings shall be interpreted in anillustrative and not in a limiting sense.

What we claim as our invention is:

.1. In a paper making machine., a couch roll, `a liber laying roll,counter balancing mechanism for the liber laying roll to regulate thepressure of thefiber laying roll on the paper web, comprising arshaftsupported above the fiber laying roll, llevers keyed on .said shaft andEmeans Voperatively kconnected to said levers for swingingly suspendingthe fiber lay-lng roll, counter balancing means carried by saidsupporting means and means for adjusting said shaft and 4retaining itinposition when adjusted.

.52. In a paper making machine and in combination, a couch roll, a fiberlaying roll., a shaft arranged above the liber laying roll,

levers rigidly secured to said shaft, sup-porting levers for the liberlaying roll, swingingly connected at one end to said levers and providedat the other end with adjustably weighted arms.

3. in a. paper making machine and in combination, a fiber laying roll,counter-balancing means for said roll, comprising supporting members forthe ro-ll, weighted lever arms for said members, a. shaft and meanscarried by said shaft adapted to swingingly engage said supporting'members and rmeans for adjusting the weights on said arms to raise orlower'the liber laying roll.

4i.. ln a paper making machine and in combination couch roll, aliberlaying roll swingingly suspended above the couclh lrollcounter-balancing means for the liber laying roll comprising weightedsupporting `levers, a shaft and means keyed to thes'haft adapted toswingingly connect with said levers and means for adjusting thev weights:for said levers. i

5. In a paper making machine, a liber ',lay-

ing roll,rsupporting members for said roll, .a shaft, levers, rigidlycarried by the ,shaft swingingly connected to the supporting members,whereby the liber laying roll is suspended and weighted arms for thesuption.

7. The dev-ice .as .claimed in claim 6, in which the means for sett-'ingtheber laying roll in adjusted position vcomprise a bracket,

fa lever keyed to one end of the shaft, swivel blocks Vcarried vbythelever and said bnacket and a screw 4member .provided with a handwheel adapted to .engage with said blocks and lock nuts on savidscrew.

8. In a papermaking machineand .combination, a couch roll, a liberlaying roll, a shaft lrotatably Lmou-ilited in bearings vabove thev.fiber laying roll, :supporting members for the liber laying roll,swinggi'ngly .Connected rigid members on saifd shaft', Vadjustfablecounter-balancing means .carried .by the supporting member-s,

9. 1n a paper making machine .and in coinbination, a liber layin'gjroll, counter-balanced supporting levers for .said roll, .a rotatablymounted .shaft and kconnecting `mem- .bers rigidly carried on .the.shaft and Swingingly connected to the supporting levers, means foradjusting the .shaft and .means for looking the shaft vin adjustedpositioni 10. VIn a pape-r making machine the combination with theliber laying roll, supported on Weighted levers, of a turnable shafthaving members rigidly mounted thereon and adapted to be swinginglyConnected to the supporting levers, means for adjusting the Weightedlevers and means for adjusting' the shaft to regulate the pressure ofthe libel' laying roll and means for securing the supporting levers andthe shaft in adjusted po sition.

11. The combination With a suction eouc'n roll of a swingably mountedfiber laying roll, means for swinging said liber laying roll todifferent positions oiroumferentially 15 of the couch roll and means forsecuring said fiber laying roll in any position to which it is moved bysaid last mentioned means..

l2. The combination with a suction couch roll and a fiber laying` rollof a eounterbal- 20 In Witness whereof We have'hereunto Set 25 ourhands.

CCNE BARLTW.v EDWA'R-D RICHARD CLAPP.

